Average GPS coordinates for Secas Postcode location: 42.1, -8.292. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Secas on map:

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Listing cities & postcodes (2):
>> Viana do Castelo, 4950-830 Secas, Povoação, Talhinhas, GPS coordinates: 42.1,-8.2667
>> Viana do Castelo, 4960-010 Secas, São Roque do Pico, Atenor, GPS coordinates: 42.1,-8.3167